Omega Electronic F300Hz Chronometer - Model Reference 198.020 - Blue T – Vintage Watch Specialist
Omega Constellation F300hz Chronometer
Omega Genève Electronic F300 Hz Chronometer Ref. 198.030, sold in 1974 - Black Bough | Ludlow
La Cote des Montres : Enchères Omega "Constellation" Chronometer, Electronic F300 Hz. Produced circa 1970. Very fine and rare center-seconds, water-resistant, stainless steel gentleman's electronic wristwatch with date and a stainless steel